Http://www.smc.com/index.cfm?event=downloads.doSearchCriteria&localeCode=EN_USA&productCategory=6&modelNumber=1482&partNumber=0&downloadType=8&knowsPartNumber=false

Gave me the manual. The product you listed is an unmanaged switch not a router. Thus, it doesn't have an web interface. You can try unplugging the device for a while and then retrying to connect to your firewall/router/local network. Also check if your computer will connect to the network without the switch. If you can connect directly without the switch, check if your product is still under warranty.

Cindy Wells